Comprehensive treatment system for foul gas and carbon dioxide in livestock farm

Abstract

The invention discloses a comprehensive treatment system for foul gas and carbon dioxide in a livestock farm. The comprehensive treatment system comprises an ammonia gas collecting chamber, an ammonia water collecting device and a reaction kettle which are communicated with the livestock farm. A negative pressure device for forming negative pressure is arranged in the ammonia gas collecting chamber, so that waste gas of the farm is sucked into the ammonia gas collecting chamber, an ultra-micro bubble generator is arranged at the top of the ammonia gas collecting chamber and is used for forming ionized ultra-micro bubbles, and a drainage water tank is arranged at the bottom of the ammonia gas collecting chamber and is used for draining the waste gas in the farm. Ammonia gas and carbon dioxide in the waste gas of the livestock farm are dissolved in the ultramicro bubbles and fall into the drainage water tank, the drainage water tank guides the collected mixed solution to the ammonia water collecting device, and the ammonia water collecting device collects the mixed solution and sends the mixed solution to the reaction kettle; after the mixed solution reacts with carbon dioxide and brine in the reaction kettle, byproducts such as ammonium salt and bicarbonate are obtained through solid-liquid separation, additional economic value is generated, carbon dioxide in a field area is neutralized, and the air quality of the farm is improved.

Description

Technical Field

[0001] The invention relates to the field of waste gas treatment, and in particular to a comprehensive treatment system for malodorous gas and carbon dioxide in a breeding farm. Background Art

[0002] In the production and operation process of intensive breeding farms, a large amount of waste gas will be generated due to the decomposition of organic matter such as animal feces and feed residues. These waste gases mainly include ammonia, carbon dioxide, and other malodorous gases, among which the content of ammonia in the waste gas is the highest. In the breeding process, the ammonia emission of each fat pig is 107.18~424.42mg / h. For large-scale pig farms with tens of thousands of pigs, the average daily nitrogen emission can reach 105kg. Ammonia not only has a pungent smell and affects the air quality, but also poses a threat to the health of animals and the surrounding ecological environment, so ammonia needs to be dealt with in time. At the same time, in the process of pig breeding, the large amount of carbon dioxide produced by respiration cannot be ignored. Excessive carbon dioxide in the farm not only affects the air quality, but also affects the health of pigs to a certain extent.

[0003] In the prior art, waste gas is generally treated in the following ways:

[0004] 1. Remove ammonia and malodorous gases through ventilation equipment;

[0005] 2. Absorb ammonia and malodorous gases through adsorption materials;

[0006] 3. Decompose ammonia and malodorous gases through biodegradation.

[0007] Since ammonia is an important raw material for the nitrogen fertilizer industry, none of the above treatment methods reasonably utilize the ammonia produced in the farm, resulting in a waste of raw materials. In addition, the removal of ammonia by ventilation, adsorption, etc. requires further treatment. For example, in the prior art, a Chinese patent with publication number CN221815725U discloses an ammonia purification and collection device for livestock and poultry breeding houses, which utilizes an air intake chamber, a spray chamber, a collection chamber, and an exhaust chamber opened in a ventilation box. Due to the property that ammonia is soluble in water, the air containing ammonia in the livestock and poultry breeding house is sucked into the spray chamber by negative pressure, and the ammonia is covered and sprayed by a relatively oblique spray rack. Then, the collection chamber can conveniently collect ammonia water, but the ammonia water still needs to be processed later.

[0008] In view of this, the present invention proposes an efficient, green, environmentally friendly and economical ammonia and carbon dioxide treatment system to solve the above problems, complete the treatment of odorous gases, and also treat carbon dioxide to achieve carbon fixation. Summary of the invention

[0009] In order to overcome the shortcomings of the above-mentioned technologies, the present invention provides a comprehensive treatment system for malodorous gases and carbon dioxide in farms, which can collect ammonia and carbon dioxide in farms, and combines chemical reaction with physical separation technology to achieve effective treatment of gases and recycling of resources.

[0010] A comprehensive treatment system for malodorous gas and carbon dioxide in a breeding farm comprises an ammonia collection chamber connected to the breeding farm, an ammonia water collection device, and a reactor. The ammonia collection chamber is provided with a negative pressure device for forming negative pressure, so that waste gas from the breeding farm is sucked into the ammonia collection chamber. The top of the ammonia collection chamber is provided with an ultrafine bubble generator for forming ionized ultrafine bubbles or is connected to a pipeline outlet that can spray ionized ultrafine bubbles. The bottom of the ammonia collection chamber is provided with a drainage trough. Ammonia and carbon dioxide in the waste gas from the breeding farm are dissolved in the ultrafine bubbles and fall into the drainage trough. The drainage trough guides the collected mixed solution to the ammonia water collection device. The ammonia water collection device collects the mixed solution and sends it to the reactor. After the mixed solution reacts with the carbon dioxide and brine in the reactor, it undergoes solid-liquid separation to obtain ammonium salt and bicarbonate.

[0011] Preferably, the ultrafine bubble generator complies with ISO / TC281 standard technology and can generate at least 10 9 The invention discloses a novel ionized ultrafine water bubble, and according to the calculation by laser diffraction method, 80% of the ultrafine water bubbles have a diameter of 50 to 300 nm.

[0012] Preferably, the farm malodorous gas and carbon dioxide comprehensive treatment system also includes a salt field and a brine storage tank. The saturated salt solution obtained by drying the brine in the salt field is formed into brine by adding excess CaCl2 and Ca(OH)2. The brine is stored in the brine storage tank. The brine contains Na + , Ca 2+ , Cl - OH - ; The mixed solution, brine, and carbon dioxide react to obtain NaHCO3, CaCO3, and NH4Cl. The reaction equation involved in this process is as follows:

[0013] NH3+H2O+CO2=NH4HCO3

[0014] NH4HCO3+NaCl=NaHCO3↓+NH4Cl

[0015] Ca 2+ +CO3 2- =CaCO3↓

[0016] Preferably, the ammonia water collection device includes an air collecting hood, a condenser, and a liquid storage tank, one end of the air collecting hood is connected to the ammonia collection chamber, the other end of the air collecting hood is connected to the feed pipe of the condenser, the negative pressure device forms a guide wind field to blow the air in the ammonia collection chamber to the air collecting hood, and the air collecting hood guides the air in the ammonia collection chamber to the condenser. Under the condensation effect, ammonia and carbon dioxide in the air are further dissolved in ultrafine bubbles, and the condensate obtained by condensation and the mixed solution collected by the drainage tank are stored in the liquid storage tank.

[0017] Preferably, the brine storage tank is connected to the reactor through a brine pipe, and the liquid storage tank is connected to the brine pipe through an ammonia pipe. The ammonia pipe is perpendicular to the brine pipe. The diameter of the brine pipe at the junction with the ammonia pipe is smaller than the diameters at both ends of the brine pipe. The brine pipe and the ammonia pipe constitute a Bernoulli device.

[0018] Preferably, a product outlet is provided at the bottom of the reactor, and a filter and a first storage tank are provided at the product outlet. The filter is used to separate the NH4Cl solution and the NaHCO3 and CaCO3 solids, and the first storage tank is used to store the NaHCO3 and CaCO3 solids.

[0019] Preferably, the integrated treatment system for malodorous gases and carbon dioxide from a breeding farm also includes a condensation crystallization device for precipitating NH4Cl, a separator for separating the precipitated NH4Cl solid, and a second storage tank for storing the NH4Cl solid. The solution filtered by the separator is returned to the salt field.

[0020] Preferably, the comprehensive treatment system for malodorous gases and carbon dioxide from a breeding farm also includes a catalytic treatment device, and the separator is a three-phase separation device. The separator is provided with a solid outlet, a liquid phase outlet, and a gas phase outlet. The solid outlet is connected to the second storage tank through a first pipe, the liquid phase outlet is connected to a second pipe extending to a salt field, and the gas phase outlet is connected to the catalytic treatment device through a third pipe.

[0021] Preferably, the integrated treatment system for malodorous gases and carbon dioxide from a breeding farm further comprises a neutralization tank, the reactor is provided with a pressure relief valve, the pressure relief valve is connected to the neutralization tank via a fourth pipeline, and an acidic solution for absorbing ammonia is provided in the neutralization tank.

[0022] Preferably, a stirring device is provided in the reactor.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention first forms electrostatically charged ultrafine bubbles through an ultrafine bubble generator. The ultrafine bubbles have a large specific surface area, which increases the contact area between ammonia and water. Moreover, the ionized ultrafine bubbles can attract ammonia molecules through the electrostatic effect, thereby improving the efficiency of ultrafine bubbles in collecting ammonia. In addition, ammonia is very soluble in water, and ultrafine bubbles containing ammonia are alkaline, which is conducive to the dissolution of carbon dioxide in farm waste gas into ultrafine bubbles, thereby realizing the collection of carbon dioxide in waste gas.

[0025] Since the ammonia content in the waste gas is greater than the carbon dioxide content, and the reaction of ammonia with carbon dioxide and water will generate ammonium bicarbonate, the ultrafine bubbles contain ammonium bicarbonate and ammonia water, and the mixed solution in the ammonia water collection device also contains ammonium bicarbonate and ammonia water, and the ammonia water needs to be further processed. Therefore, the mixed solution needs to react with carbon dioxide and brine in the reactor to generate ammonium salt and bicarbonate.

[0026] The comprehensive waste gas treatment system of the present invention not only treats ammonia in the site, neutralizes carbon dioxide in the site, and improves the air quality of the farm, but also produces by-products such as ammonium salts and bicarbonates, providing additional economic value, and combining waste treatment with green industry innovation.

[0027] 2. The brine used in the present invention is formed by adding excess CaCl2 and Ca(OH)2 into a saturated salt solution obtained by drying salt water in a salt field, which has a low cost. CaCl2 and Ca(OH)2 can remove MgSO4 in the saturated salt solution and reduce Mg in the brine. 2+ 、SO4 2- content and provide Ca 2+ .Ca 2+ CO3 in brine 2- Reaction to generate CaCO3 as a by-product with economic value.

[0028] 3. The waste gas from the farm enters the ammonia collection room under the action of the negative pressure device, and the negative pressure device forms a guide wind field. Since the waste gas from the farm usually also includes hydrogen sulfide, hydrogen sulfide can be dissolved in water mist and undergo redox reaction with oxygen in the guide wind field to generate H2SO3. Ca in the brine 2+ OH - It can neutralize H2SO3 and generate CaSO3 precipitation, thereby achieving the treatment of hydrogen sulfide odor gas.

[0029] 4. The ammonia water collection device includes a gas collecting hood, a condenser, and a liquid storage tank. The negative pressure device forms a guide wind field to blow the ultrafine bubbles and air in the ammonia collection chamber that have not fallen into the drainage trough to the gas collecting hood. The gas collecting hood guides these gases to the condenser. Due to the decrease in temperature, the solubility of the gas increases. Under the action of condensation, the ammonia and carbon dioxide in the air that have not been collected are dissolved in the ultrafine bubbles, and the ammonia and carbon dioxide in the exhaust gas are further collected.

[0030] 5. The present invention utilizes the different solubilities of NaHCO3, CaCO3, and NH4Cl to separate the NH4Cl solution after the reaction from the insoluble NaHCO3 and CaCO3 solids, and then uses a condensation crystallization device to grade the temperature to allow the NH4Cl to crystallize, and utilizes the difference in solubility to physically separate the mixed product salt, avoiding the use of chemical reagents for purification, and reducing environmental pollution. Moreover, the solution filtered by the separator is returned to the salt field to achieve the recycling of resources as much as possible.

[0031] 6. The reactor is provided with a pressure relief valve, which is connected to the neutralization tank through a fourth pipeline. The neutralization tank is provided with an acidic solution for absorbing ammonia to prevent ammonia in the reactor from leaking into the air.

[0032] 7. The entire gas treatment system extracts the waste gas from the farm, placing the farm in a slightly negative pressure environment, thereby preventing the odorous gas from the farm from spreading outward and maintaining the surrounding environment of the farm. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of a comprehensive treatment system for malodorous gases and carbon dioxide in a breeding farm according to the present invention.

[0034] Figure 2 Schematic diagram of the ammonia collection chamber of the present invention. DETAILED DESCRIPTION

[0035] The features of the present invention and other related features are further described in detail below through embodiments to facilitate understanding by those skilled in the art:

[0036] An embodiment of the present invention provides a comprehensive treatment system for malodorous gases and carbon dioxide in a breeding farm, comprising an ammonia gas collection chamber 1 connected to the breeding farm, an ammonia water collection device 2, and a reaction kettle 3.

[0037] like Figure 2 As shown, the ammonia collection chamber 1 is provided with a negative pressure device 12, so that the waste gas from the farm is sucked into the ammonia collection chamber 1. The top of the ammonia collection chamber 1 is provided with an ultrafine bubble generator, which is used to form ionized ultrafine bubbles with a diameter of 50 to 300 nm, and generates about 10 per milliliter of water. 9Ultrafine bubbles are formed, and the ultrafine bubbles meet the technical standard of ISO / TC281. In other embodiments, the top of the ammonia collection chamber 1 can also be connected with a pipeline outlet that can spray ionized ultrafine bubbles. Specifically, when water passes through the nozzle or orifice plate of the ultrafine bubble generator, the high-pressure water flow will form a low-pressure area, i.e., a gravity hole. This low-pressure area makes it easier for gas to be inhaled and dissolved in water. Under the action of high pressure, the gas is forced to be injected into the water flow. Due to the existence of the gravity hole, the gas can be quickly dispersed and form a large number of negatively charged ultrafine bubbles. Since the ultrafine bubbles all carry the same charge, the ultrafine bubbles are difficult to merge and can be more stably present in the air. And the specific surface area of ​​the ultrafine bubbles is large, which increases the contact area between ammonia and water, and the ionized ultrafine bubbles can attract ammonia molecules through the electrostatic effect, thereby improving the efficiency of ultrafine bubbles collecting ammonia. Moreover, ammonia is easily soluble in water, and ultrafine bubbles containing ammonia are alkaline, which is conducive to the dissolution of carbon dioxide in the waste gas from the farm into ultrafine bubbles, thereby realizing the collection of carbon dioxide in the waste gas.

[0038] A drainage trough 13 is provided at the bottom of the ammonia collection chamber 1. Ammonia and carbon dioxide in the waste gas of the farm are dissolved in the ultrafine bubbles and fall into the drainage trough 13. The drainage trough 13 guides the collected mixed solution to the ammonia collection device 2. Since the content of ammonia in the waste gas is greater than that of carbon dioxide, and ammonia reacts with carbon dioxide and water to generate ammonium bicarbonate, the ultrafine bubbles contain ammonium bicarbonate and ammonia water, and the mixed solution in the ammonia collection device also contains ammonium bicarbonate and ammonia water.

[0039] The ammonia water collecting device 2 collects the mixed solution and sends it to the reactor 3. After the mixed solution reacts with the carbon dioxide and brine in the reactor 3, ammonium salt and bicarbonate are obtained through solid-liquid separation.

[0040] Specifically, the negative pressure device 12 is a plurality of axial flow fans.

[0041] like Figure 1 As shown, the farm malodorous gas and carbon dioxide comprehensive treatment system also includes a salt field 4 and a brine storage tank 41. The saturated salt solution obtained by the salt field 4 when drying the brine is formed into brine by adding excessive CaCl2 and Ca(OH)2. CaCl2 and Ca(OH)2 are used to remove MgSO4 in the saturated salt solution to generate byproducts CaSO4 and Mg(OH)2, so that the brine contains Na + , Ca 2+ , Cl - OH - The brine is stored in a brine storage tank 41. 2+ CO3 in brine 2- Reaction to generate CaCO3 as a by-product with economic value.

[0042] The ammonia water collecting device 2 includes an air collecting hood 23, a condenser 21, and a liquid storage tank 22. One end of the air collecting hood 23 is connected to the ammonia collecting chamber 1, and the other end of the air collecting hood 23 is connected to the feed pipe of the condenser 21. The negative pressure device 12 forms a guide wind field to blow the air in the ammonia collecting chamber 1 to the air collecting hood 23, and the air collecting hood 23 guides the air in the ammonia collecting chamber 1 to the condenser 21. Under the condensation effect, the ammonia and carbon dioxide in the air that are not collected are dissolved in the ultrafine bubbles, and the ammonia and carbon dioxide in the exhaust gas are further collected. The condensate obtained by condensation and the mixed solution collected by the drainage tank 13 are stored in the liquid storage tank 22.

[0043] Since the reactor 3 needs to be sealed during the reaction, a liquid storage tank 22 is required to temporarily store the mixed solution containing ammonia water. When the reactor 3 needs to be fed, the mixed solution in the liquid storage tank 22 is transported to the reactor 3.

[0044] The brine storage tank 41 is connected to the reactor 3 through a brine pipe 411, and the liquid storage tank 22 is connected to the brine pipe 411 through an ammonia pipe 221. The ammonia pipe 221 is perpendicular to the brine pipe 411. The diameter of the brine pipe 411 at the connection with the ammonia pipe 221 is smaller than the diameters at both ends of the brine pipe 411, so that the flow rate of the brine pipe 411 at the connection with the ammonia pipe 221 is large and the pressure is small, which is conducive to the downstream mixing of ammonia water and brine; and the diameters at both ends of the brine pipe 411 are large, the flow rate is small, and the pressure is large, so that the pressure and flow rate in the brine pipe 411 are different, which is conducive to the full mixing of ammonia water and brine.

[0045] The integrated treatment system for malodorous gas and carbon dioxide in a breeding farm further comprises a carbon dioxide storage tank 5, wherein the carbon dioxide storage tank 5 is used for storing carbon dioxide.

[0046] A product outlet is provided at the bottom of the reactor 3, and a filter 61 and a first storage tank 62 are provided at the product outlet. The filter 61 is used to separate the NH4Cl solution and the NaHCO3 and CaCO3 solids, and the first storage tank 62 is used to store the NaHCO3 and CaCO3 solids.

[0047] The comprehensive treatment system for malodorous gas and carbon dioxide in the breeding farm also includes a condensation crystallization device 63 for precipitating NH4Cl, a separator 64 for separating and precipitating NH4Cl solid, and a second storage tank 65 for storing NH4Cl solid. The solution filtered by the separator 64 is returned to the salt field 4.

[0048] The farm malodorous gas and carbon dioxide comprehensive treatment system also includes a catalytic treatment device. The separator 64 is a three-phase separation device. The separator 64 is provided with a solid outlet, a liquid phase outlet, and a gas phase outlet. The solid outlet is connected to the second storage tank 65 through a first pipeline 67. The liquid phase outlet is connected to a second pipeline 68 extending to the salt field 4. The gas phase outlet is connected to the catalytic treatment device (not shown in the drawings) through a third pipeline. The catalytic treatment device is used to treat the remaining malodorous waste gas.

[0049] The present invention utilizes the different solubilities of NaHCO3, CaCO3, and NH4Cl to separate the NH4Cl solution after the reaction from the insoluble NaHCO3 and CaCO3 solids, and then cools the NH4Cl through the condensation crystallization device 63 to crystallize the NH4Cl, and utilizes the difference in solubility to physically separate the mixed product salt, avoiding the use of chemical reagents for purification, and reducing environmental pollution. Moreover, the solution filtered by the separator 64 is returned to the salt drying field 4, realizing the recycling of resources as much as possible.

[0050] The farm malodorous gas and carbon dioxide comprehensive treatment system also includes a neutralization tank 7, the reactor 3 is provided with a pressure relief valve 71, the pressure relief valve 71 is connected to the neutralization tank 7 through a fourth pipeline 72, and the neutralization tank 7 is provided with an acidic solution for absorbing ammonia to prevent ammonia in the reactor 3 from leaking into the air. In this embodiment, the acidic solution is a NaHSO4 solution, and the chemical equation involved in the neutralization reaction process is: 2NaHSO4+2NH3=(NH4)2SO4+Na2SO4+H2O.

[0051] A stirring device is provided in the reaction kettle 3 for stirring the ammonia water, the brine and the carbon dioxide to fully react. A filtering device is provided at the air inlet of the ammonia collection chamber 1.

[0052] The process of treating waste gas from a farm in an embodiment of the present invention is as follows: First, the ultrafine bubble generator 11 forms ultrafine bubbles, which fall from the top of the ammonia collection chamber 1 and fill the entire ammonia collection chamber 1. Then the negative pressure device 12 works, the ammonia collection chamber 1 is in a negative pressure state, and the waste gas from the farm is sucked into the farm under the action of negative pressure. The waste gas contacts the ultrafine bubbles. Since the waste gas contains a large amount of carbon dioxide and ammonia, ammonia is easily soluble in water, and the ultrafine bubbles are small in size and large in specific surface area. The contact area between the ultrafine bubbles and the waste gas is large, so that most of the ammonia in the waste gas is dissolved in the ultrafine bubbles. Ammonia dissolves in the ultrafine bubbles, making the ultrafine bubbles alkaline. The alkaline ultrafine bubbles easily absorb carbon dioxide in the waste gas, thereby realizing the first step of collecting ammonia and carbon dioxide in the waste gas.

[0053] Afterwards, most of the ultrafine bubbles fall into the drainage trough 13 under the action of gravity, and the drainage trough 13 is inclined toward the liquid storage tank, so that the mixed solution collected by the drainage trough 13 is inclined to flow toward the liquid storage tank. A small number of ultrafine bubbles that have not fallen into the drainage trough 13 are guided by the negative pressure device to form a guide wind field to blow the air in the ammonia collection chamber to the gas collection hood. The gas collection hood guides the air in the ammonia collection chamber to the condenser. The air in the ammonia collection chamber includes ultrafine bubbles, unabsorbed ammonia, and carbon dioxide. The condenser condenses the ultrafine bubbles through heat exchange, and because the lower the temperature, the higher the solubility of ammonia and carbon dioxide, so that ammonia and carbon dioxide are further dissolved in the ultrafine bubbles, and the condensed liquid obtained by condensation is transported and stored in the liquid storage tank, thereby realizing the second step of collecting ammonia and carbon dioxide in the exhaust gas. Most of the mixed solution in the liquid storage tank is ammonia water.

[0054] The mixed solution is transported to the brine pipe 411 through the ammonia pipe 221, and is fully mixed with the brine in the brine pipe 411 before being transported to the reactor 3. The carbon dioxide in the carbon dioxide storage tank 5 is then transported to the reactor 3. After the transportation is completed, all inlets of the reactor 3 are closed, and the stirring device is turned on to stir the mixture in the reactor 3, and a chemical reaction occurs. The main reaction equations involved in this process are as follows: NH3+H2O+CO2=NH4HCO3, NH4HCO3+NaCl=NaHCO3↓+NH4Cl, Ca 2+ +CO3 2- =CaCO3↓.

[0055] After the reaction is completed, the mixture in the reactor 3 flows from the product outlet to the filter 61. Since the solubility of NaHCO3 and CaCO3 is relatively small and the solubility of NH4Cl is relatively large, most of the NaHCO3 and CaCO3 are solid precipitates. The filter 61 separates the NH4Cl solution from the NaHCO3 and CaCO3 solids, and the filtered NaHCO3 and CaCO3 solids are stored in the first storage tank 62. The NH4Cl solution enters the condensation crystallization device 63, and the NH4Cl cooled and crystallized at 5°C to 10°C is stored in the second storage tank 65. The remaining solution flows back to the salt field 4, and the remaining odorous gas is treated by the catalytic treatment device 66 and then discharged.

[0056] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A comprehensive treatment system for malodorous gas and carbon dioxide in a breeding farm, characterized in that: The invention comprises an ammonia collection chamber (1) connected to a breeding farm, an ammonia water collection device (2), and a reaction kettle (3). The ammonia collection chamber (1) is provided with a negative pressure device (12) for forming a negative pressure so that waste gas from the breeding farm is sucked into the ammonia collection chamber (1). The top of the ammonia collection chamber (1) is provided with an ultrafine bubble generator (11) for forming ionized ultrafine bubbles or is connected to a pipe outlet for spraying ionized ultrafine bubbles. The bottom of the ammonia collection chamber (1) is provided with a drainage trough (13). Ammonia and carbon dioxide in the waste gas from the breeding farm are dissolved in the ultrafine bubbles and fall into the drainage trough (13). The drainage trough (13) guides the collected mixed solution to the ammonia water collection device (2). The ammonia water collection device (2) collects the mixed solution and sends it to the reaction kettle (3). After the mixed solution reacts with the carbon dioxide and brine in the reaction kettle (3), ammonium salt and bicarbonate are obtained through solid-liquid separation.

2. A comprehensive treatment system for malodorous gas and carbon dioxide in a farm according to claim 1, characterized in that: The ultrafine bubble generator can generate at least 10 9 The invention discloses a novel ionized ultrafine water bubble, and according to the calculation by laser diffraction method, 80% of the ultrafine water bubbles have a diameter of 50 to 300 nm.

3. The comprehensive treatment system for malodorous gas and carbon dioxide in a breeding farm according to claim 1 is characterized in that: The invention also includes a salt field (4) and a salt water storage tank (41). The saturated salt solution obtained when the salt water is dried in the salt field (4) is formed into brine by adding excess CaCl2 and Ca(OH)2. The brine is stored in the salt water storage tank (41). The brine includes Na + , Ca 2+ , Cl - OH - The mixed solution, brine and carbon dioxide react in a reactor (3) to obtain NaHCO3, CaCO3 and NH4Cl.

4. A comprehensive treatment system for malodorous gas and carbon dioxide in a breeding farm according to claim 3, characterized in that: The ammonia water collecting device (2) comprises an air collecting hood (23), a condenser (21), and a liquid storage tank (22); one end of the air collecting hood (23) is connected to the ammonia collection chamber (1); the other end of the air collecting hood (23) is connected to the feed pipe of the condenser (21); the negative pressure device (12) forms a guide wind field to blow the air in the ammonia collection chamber (1) to the air collecting hood (23); the air collecting hood (23) guides the air in the ammonia collection chamber (1) to the condenser (21); under the action of condensation, ammonia and carbon dioxide in the air are further dissolved in ultrafine bubbles; the condensate obtained by condensation and the mixed solution collected by the drainage tank (13) are both stored in the liquid storage tank (22).

5. A comprehensive treatment system for malodorous gas and carbon dioxide in a breeding farm according to claim 4, characterized in that: The brine storage tank (41) is connected to the reactor (3) via a brine pipe (411), and the liquid storage tank (22) is connected to the brine pipe (411) via an ammonia pipe (221). The ammonia pipe (221) is perpendicular to the brine pipe (411). The diameter of the brine pipe (411) at the junction with the ammonia pipe (221) is smaller than the diameters of the two ends of the brine pipe (411). The brine pipe (411) and the ammonia pipe (221) form a Bernoulli device.

6. The integrated treatment system for malodorous gas and carbon dioxide in a breeding farm according to claim 3, characterized in that: The bottom of the reactor (3) is provided with a product outlet, and a filter (61) and a first storage tank (62) are provided at the product outlet. The filter (61) is used to separate the NH4Cl solution and the NaHCO3 and CaCO3 solids, and the first storage tank (62) is used to store the NaHCO3 and CaCO3 solids.

7. A comprehensive treatment system for malodorous gas and carbon dioxide in a breeding farm according to claim 6, characterized in that: It also includes a condensation crystallization device (63) for precipitating NH4Cl, a separator (64) for separating the precipitated NH4Cl solid, and a second storage tank (65) for storing the NH4Cl solid. The solution filtered by the separator (64) is refluxed to the salt drying field (4).

8. The integrated treatment system for malodorous gas and carbon dioxide in a breeding farm according to claim 7, characterized in that: It also includes a catalytic treatment device, the separator (64) is a three-phase separation device, the separator (64) is provided with a solid outlet, a liquid phase outlet, and a gas phase outlet, the solid outlet is connected to the second storage tank (65) through a first pipeline (67), the liquid phase outlet is connected to a second pipeline (68) extending to the salt field (4), and the gas phase outlet is connected to the catalytic treatment device through a third pipeline.

9. The integrated treatment system for malodorous gas and carbon dioxide in a breeding farm according to claim 1, characterized in that: The reactor (3) further comprises a neutralization tank (7). The reactor (3) is provided with a pressure relief valve (71). The pressure relief valve (71) is connected to the neutralization tank (7) through a fourth pipeline (72). An acidic solution for absorbing ammonia is provided in the neutralization tank (7).

10. The integrated treatment system for malodorous gas and carbon dioxide in a breeding farm according to claim 1, characterized in that: The reaction kettle (3) is provided with a stirring device.

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